Reign of Alfonso XIII
Alfonso XIII became King of Spain at the moment of his birth in May 1886 because his father, Alfonso XII, had died five months earlier. His mother, Maria Christina of Austria, was regent until May 1902, when he turned sixteen and took the oath of office under the Constitution of 1876, when he began his personal reign, which lasted until 14 April 1931, when he had to go into exile after the proclamation of the Second Republic.